macOS snapshot: octave mex now included

_includes/download-snapshot.html

@@ -39,12 +39,10 @@
   <section class="dynare_section" id="snapshot_content2">
     <p>
       Compatible with macOS (10.11 and later, earlier versions may work but
-      have not been tested) and any 64-bit MATLAB. This package does NOT
-      support Dynare on Octave. To use Dynare with Octave on macOS, see the
-      <a href="http://www.dynare.org/DynareWiki/InstallOnMacOSX">Installation instructions for
-      macOS</a>. <b>NB</b>: This
-      package is unsigned; to run it, you need to right click on it and select
-      "Open" from the menu that pops up.
+      have not been tested), any 64-bit MATLAB, and Octave (5.1.0 installed
+      via <a href="https://brew.sh/">Homebrew</a>). <b>NB</b>: This package is
+      unsigned; to run it, you need to right click on it and select "Open" from
+      the menu that pops up.
     </p>
     <div class="download_table">
       {% include snapshot/download-snapshot-macos.html %}